Engine under compression!!?

[Freeman13]

Hey guys well what i thought was oil coming out of my dump valve is actually oil being pushed up out of the dipstick tube, im guessing it must be a piston ring causing the engine to put the bottom end under compression??

Has anyone else had this sort of problem?? have gone over my breather system and is all fine, oil has been drained and changed.

any help would be much appreciated

cheers chris

[RICHIE]

Hey guys well what i thought was oil coming out of my dump valve is actually oil being pushed up out of the dipstick tube, im guessing it must be a piston ring causing the engine to put the bottom end under compression??

Has anyone else had this sort of problem?? have gone over my breather system and is all fine, oil has been drained and changed.

any help would be much appreciated

cheers chris

have you tried a compression test. does the car breath heavy out of the oil filler cap. is the car smoking at all. the symptoms you are describing do sound like a possible ring failure mate

[Freeman13]

havent done a compression test yet all my tools are still down south:mad: need to pick them up soon, i shall try and get a tester from halfords in abit.

There is abit of smoke out the exhaust not much but it does breath heavy out the oil filler cap, if it is the rings how much am i looking for new liners and pistons with rings??

[raj]

if it is the rings how much am i looking for new liners and pistons with rings??

if its the rings, why not just give the existing liners a quick rehone and replace the rings? job done:) i would have thought a set of rings are around £60.

[Markey Mark (BD)]

Sounds like pistons rings are worn out and presurizing the bottom end, pull it apart and see the condition of the liners they may be ok and just need a clean up with a new set of rings on the pistons.
If not a full set of new pistons/liners will be about £160-£180

[Freeman13]

how hard is it to rehone the existing liners?? How hard of a job is it to remove the pistons on the 5??

[Markey Mark (BD)]

how hard is it to rehone the existing liners?? How hard of a job is it to remove the pistons on the 5??

Not hard at all mate to hone liners, to remove the liners and pistons you need to remove the head and sump, undo the con-rod bolts and then pull the liner/piston out from the top. Could have it stripped down in about an hour or so if your confident to do it.

[Freeman13]

yeah should be ok doing that, well i know what im doing tonight then lol

[Rob@Backyardracing]

Dont forget to add gasket sets in your price as you will need both base and top sets... GSF best place for these and dont cost more than £50-£60 for the pair..:agree:

[Freeman13]

is there anyfin else i will need?? is it worth going uprated head gasket??

[Rob@Backyardracing]

The set from GSF is the uprated headgasket.. Its just thicker than the std gasket, so not uprated in anyway in its structure from what i beleave.. either will do fine tho.. Dont forget price up oils and fitlers and coolant :)... All adds up so its not the straight forward £160 for the piston/liner kit ;)

[Andrew Cooke]

of course, you might just need to fit the dipstick in a bit tighter...

[Freeman13]

lol im sure the dipstick shouldnt pop and and oil spray out unless thats what all 5`s do??

[Andrew Cooke]

lol im sure the dipstick shouldnt pop and and oil spray out unless thats what all 5`s do??
:innocent:

[DaveMayGTT]

Im sure ive seen other people post similar probs with dip stick and its just where the tube it fits in need crimping as its become loose with age. Not saying you dont have other probs obviously but worth a try

[Freeman13]

yeah will give it a try, will compression check it 2moro and go from there. will let you guys no the results what sort of compression am i looking for??

[michael tierney]

9-10.5 bar,check manifold one way valves and breather pipe restrictor for blockage!!

[Alex]

I certainly wouldn't rule out what Andy's mentioned - I've had to crimp the end of the dipstick tube (ooohheeeer!) myself due to the same problem :)

[Adam 005]

my gt used tp blow the dip stick out.Cause the plastic goes hard on the stick over time i put a little bit of tape round it problem sorted.
I have aso seen the hook bit get caught on ht leads and dislodge this way.:):)

[RichR]

I believe there are two designs of dipstick for the GT Turbo- the earlier one tends to blow out once there's any level of crank case pressurisation (which with the simple breather system can happen) - and the later type that stays in better.

But you really should see if the dipstick blowing out is a result of worn rings, and a compression (or ideally a leak down) test will give you a good idea.

[raj]

are new dipsticks still available..?

[Jono]

I certainly wouldn't rule out what Andy's mentioned - I've had to crimp the end of the dipstick tube (ooohheeeer!) myself due to the same problem :)

You cant beat a bit of dipstick crimping.... and its nearly weekend too!

Mine blew oil everywhere..it was so bad I had it towed home as a precaustion and no my rings wern't foooked.

[Adam 005]

are new dipsticks still available..?

look under members:D:D

[Freeman13]

Right well i havent had time to get a compression tester yet, but i put some tape round the dipstick to hold it in and started her up after running on idle for about 3 minutes it was pushing oil out of the rocker seal as it was pressurizing the top end :confused:

[Andrew Cooke]

Right well i havent had time to get a compression tester yet, but i put some tape round the dipstick to hold it in and started her up after running on idle for about 3 minutes it was pushing oil out of the rocker seal as it was pressurizing the top end :confused:

that's not a good sign :(

[Adam L]

I did that on my first Pulsar engine, although I was at about 7k rpm in 4th. I covered the dual carriagway in oily smoke...

Needless to say, i'd mullered a piston.

[Freeman13]

Thats not the kind of thing i wanted to hear lol :cry:

[Rob@Backyardracing]

Sounds like you need an engine rebuilder :) Still go ahead anyway with compression test and do the old oil down plug hole test..

[Freeman13]

Sounds like you need an engine rebuilder

is that an offer lol??

[Rob@Backyardracing]

Drop me a pm..

[Freeman13]

Ok finally got some time on the 5 rebuilt my carb today and got round to do a compression test these are my findings.

cylinder 1: 10 bar
cylinder 2: 10 bar
cylinder 3: 5 bar :sad2:
cylinder 4: 10 bar

[Sparkie]

ringa dinga ding! :(